was here in 1928? and tonight, the letter president obama sent to cuba before he even arrived. this moment, 88 years in the making, once unthinkable. the first family in cuba tonight. air force one landing here in havana. a much different entrance last time. president calvin coolidge, sailing into havana on a battleship. the only other sitting u.s. president to visit here. it was 1928. his wife, grace, arm in arm with the cuban president. the cheering crowds, leaning from balconies, welcoming president coolidge. a reporter, writing for "the new york times" back then saying, "his face was full of smiles." the streets, then and now, with cuban and american flags. and tonight, president obama, seen smiling too. the president sent a letter to cuba this past week, one of the first direct letters to arrive here in decades. the president writing to a cuban woman. ileana yarza, who has written the president before, sharing her happiness at the president "taking this much needed step."